.TH "SoSFImage" 3 "Tue Dec 26 2023 17:59:22" "Version 4.0.2" "Coin" \" -*- nroff -*-
.ad l
.nh
.SH NAME
SoSFImage \- The \fBSoSFImage\fP class is used to store pixel images\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <Inventor/fields/SoSFImage\&.h>\fP
.PP
Inherits \fBSoSField\fP\&.
.SS "Public Types"

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.RI "enum \fBCopyPolicy\fP { \fBCOPY\fP, \fBNO_COPY\fP, \fBNO_COPY_AND_DELETE\fP, \fBNO_COPY_AND_FREE\fP }"
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Public Types inherited from \fBSoField\fP
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.RI "enum \fBFieldType\fP { \fBNORMAL_FIELD\fP = 0, \fBEVENTIN_FIELD\fP, \fBEVENTOUT_FIELD\fP, \fBEXPOSED_FIELD\fP }"
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.SS "Public Member Functions"

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.RI "\fBvirtual\fP \fBSoType\fP \fBgetTypeId\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvirtual\fP \fBvoid\fP \fBcopyFrom\fP (\fBconst\fP \fBSoField\fP &\fBfield\fP)"
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.RI "\fBconst\fP \fBSoSFImage\fP & \fBoperator=\fP (\fBconst\fP \fBSoSFImage\fP &\fBfield\fP)"
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.RI "\fBvirtual\fP SbBool \fBisSame\fP (\fBconst\fP \fBSoField\fP &\fBfield\fP) \fBconst\fP"
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.RI "\fBconst\fP \fBunsigned\fP char * \fBgetValue\fP (\fBSbVec2s\fP &size, int &\fBnc\fP) \fBconst\fP"
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.RI "\fBconst\fP \fBSbImage\fP & \fBgetValue\fP () \fBconst\fP"
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.RI "\fBvoid\fP \fBsetValue\fP (\fBconst\fP \fBSbVec2s\fP &size, \fBconst\fP int \fBnc\fP, \fBconst\fP \fBunsigned\fP char *pixels, CopyPolicy \fBcopypolicy\fP=COPY)"
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.RI "int \fBoperator==\fP (\fBconst\fP \fBSoSFImage\fP &\fBfield\fP) \fBconst\fP"
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.RI "int \fBoperator!=\fP (\fBconst\fP \fBSoSFImage\fP &\fBfield\fP) \fBconst\fP"
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.RI "\fBunsigned\fP char * \fBstartEditing\fP (\fBSbVec2s\fP &size, int &\fBnc\fP)"
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.RI "\fBvoid\fP \fBfinishEditing\fP (\fBvoid\fP)"
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.RI "\fBvoid\fP \fBsetSubValue\fP (\fBconst\fP \fBSbVec2s\fP &\fBdims\fP, \fBconst\fP \fBSbVec2s\fP &offset, \fBunsigned\fP char *pixels)"
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.RI "\fBvoid\fP \fBsetSubValues\fP (\fBconst\fP \fBSbVec2s\fP *\fBdims\fP, \fBconst\fP \fBSbVec2s\fP *\fBoffsets\fP, int num, \fBunsigned\fP char **\fBpixelblocks\fP)"
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.RI "\fBunsigned\fP char * \fBgetSubTexture\fP (int idx, \fBSbVec2s\fP &\fBdims\fP, \fBSbVec2s\fP &offset) \fBconst\fP"
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.RI "SbBool \fBhasSubTextures\fP (int &\fBnumsubtextures\fP)"
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.RI "\fBvoid\fP \fBsetNeverWrite\fP (SbBool \fBflag\fP)"
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.RI "SbBool \fBisNeverWrite\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBhasTransparency\fP (\fBvoid\fP) \fBconst\fP"
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Public Member Functions inherited from \fBSoSField\fP
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.RI "\fBvirtual\fP \fB~SoSField\fP ()"
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Public Member Functions inherited from \fBSoField\fP
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.RI "\fBvirtual\fP \fB~SoField\fP ()"
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.RI "\fBvoid\fP \fBsetIgnored\fP (SbBool \fBignore\fP)"
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.RI "SbBool \fBisIgnored\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBsetDefault\fP (SbBool \fBdefaultVal\fP)"
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.RI "SbBool \fBisDefault\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBisOfType\fP (\fBconst\fP \fBSoType\fP type) \fBconst\fP"
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.RI "\fBvoid\fP \fBenableConnection\fP (SbBool \fBflag\fP)"
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.RI "SbBool \fBisConnectionEnabled\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBconnectFrom\fP (\fBSoEngineOutput\fP *master, SbBool \fBnotnotify\fP=FALSE, SbBool append=FALSE)"
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.RI "SbBool \fBappendConnection\fP (\fBSoEngineOutput\fP *master, SbBool \fBnotnotify\fP=FALSE)"
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.RI "\fBvoid\fP \fBdisconnect\fP (\fBSoEngineOutput\fP *\fBengineoutput\fP)"
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.RI "SbBool \fBisConnectedFromEngine\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBgetConnectedEngine\fP (\fBSoEngineOutput\fP *&master) \fBconst\fP"
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.RI "SbBool \fBconnectFrom\fP (\fBSoField\fP *master, SbBool \fBnotnotify\fP=FALSE, SbBool append=FALSE)"
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.RI "SbBool \fBappendConnection\fP (\fBSoField\fP *master, SbBool \fBnotnotify\fP=FALSE)"
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.RI "\fBvoid\fP \fBdisconnect\fP (\fBSoField\fP *\fBfield\fP)"
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.RI "SbBool \fBisConnectedFromField\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBgetConnectedField\fP (\fBSoField\fP *&master) \fBconst\fP"
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.RI "int \fBgetNumConnections\fP (\fBvoid\fP) \fBconst\fP"
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.RI "int \fBgetForwardConnections\fP (\fBSoFieldList\fP &\fBslavelist\fP) \fBconst\fP"
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.RI "int \fBgetConnections\fP (\fBSoFieldList\fP &\fBmasterlist\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBdisconnect\fP (\fBvoid\fP)"
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.RI "SbBool \fBisConnected\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBsetContainer\fP (\fBSoFieldContainer\fP *\fBcont\fP)"
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.RI "\fBSoFieldContainer\fP * \fBgetContainer\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBset\fP (\fBconst\fP char *\fBvaluestring\fP)"
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.RI "\fBvoid\fP \fBget\fP (\fBSbString\fP &\fBvaluestring\fP)"
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.RI "SbBool \fBshouldWrite\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvirtual\fP \fBvoid\fP \fBtouch\fP (\fBvoid\fP)"
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.RI "\fBvirtual\fP \fBvoid\fP \fBstartNotify\fP (\fBvoid\fP)"
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.RI "\fBvirtual\fP \fBvoid\fP \fBnotify\fP (\fBSoNotList\fP *\fBnlist\fP)"
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.RI "SbBool \fBenableNotify\fP (SbBool on)"
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.RI "SbBool \fBisNotifyEnabled\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBaddAuditor\fP (\fBvoid\fP *f, \fBSoNotRec::Type\fP type)"
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.RI "\fBvoid\fP \fBremoveAuditor\fP (\fBvoid\fP *f, \fBSoNotRec::Type\fP type)"
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.RI "int \fBoperator==\fP (\fBconst\fP \fBSoField\fP &f) \fBconst\fP"
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.RI "int \fBoperator!=\fP (\fBconst\fP \fBSoField\fP &f) \fBconst\fP"
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.RI "\fBvirtual\fP \fBvoid\fP \fBconnectionStatusChanged\fP (int \fBnumconnections\fP)"
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.RI "SbBool \fBisReadOnly\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvirtual\fP \fBvoid\fP \fBfixCopy\fP (SbBool \fBcopyconnections\fP)"
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.RI "\fBvirtual\fP SbBool \fBreferencesCopy\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBcopyConnection\fP (\fBconst\fP \fBSoField\fP *fromfield)"
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.RI "\fBvirtual\fP SbBool \fBread\fP (\fBSoInput\fP *input, \fBconst\fP \fBSbName\fP &name)"
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.RI "\fBvirtual\fP \fBvoid\fP \fBwrite\fP (\fBSoOutput\fP *\fBout\fP, \fBconst\fP \fBSbName\fP &name) \fBconst\fP"
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.RI "\fBvirtual\fP \fBvoid\fP \fBcountWriteRefs\fP (\fBSoOutput\fP *\fBout\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBsetFieldType\fP (int type)"
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.RI "int \fBgetFieldType\fP (\fBvoid\fP) \fBconst\fP"
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.RI "SbBool \fBgetDirty\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvoid\fP \fBsetDirty\fP (SbBool dirty)"
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.RI "\fBvoid\fP \fBevaluate\fP (\fBvoid\fP) \fBconst\fP"
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.SS "Static Public Member Functions"

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.RI "\fBstatic\fP \fBvoid\fP * \fBcreateInstance\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBSoType\fP \fBgetClassTypeId\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBvoid\fP \fBinitClass\fP (\fBvoid\fP)"
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Static Public Member Functions inherited from \fBSoSField\fP
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.RI "\fBstatic\fP \fBvoid\fP \fBinitClass\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBSoType\fP \fBgetClassTypeId\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBvoid\fP \fBatexit_cleanup\fP (\fBvoid\fP)"
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Static Public Member Functions inherited from \fBSoField\fP
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.RI "\fBstatic\fP \fBvoid\fP \fBinitClass\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBvoid\fP \fBinitClasses\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBvoid\fP \fBcleanupClass\fP (\fBvoid\fP)"
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.RI "\fBstatic\fP \fBSoType\fP \fBgetClassTypeId\fP (\fBvoid\fP)"
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.SS "Additional Inherited Members"


Protected Member Functions inherited from \fBSoSField\fP
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.RI "\fBSoSField\fP (\fBvoid\fP)"
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Protected Member Functions inherited from \fBSoField\fP
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.RI "\fBSoField\fP (\fBvoid\fP)"
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.RI "\fBvoid\fP \fBvalueChanged\fP (SbBool \fBresetdefault\fP=TRUE)"
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.RI "\fBvirtual\fP \fBvoid\fP \fBevaluateConnection\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvirtual\fP SbBool \fBreadConnection\fP (\fBSoInput\fP *\fBin\fP)"
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.RI "\fBvirtual\fP \fBvoid\fP \fBwriteConnection\fP (\fBSoOutput\fP *\fBout\fP) \fBconst\fP"
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.RI "SbBool \fBisDestructing\fP (\fBvoid\fP) \fBconst\fP"
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.RI "\fBvirtual\fP \fBSoNotRec\fP \fBcreateNotRec\fP (\fBSoBase\fP *\fBcont\fP)"
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.SH "Detailed Description"
.PP 
The \fBSoSFImage\fP class is used to store pixel images\&. 

The \fBSoSFImage\fP class provides storage for inline 2D image maps\&. Images in Coin are mainly used for texture mapping support\&.
.PP
\fBSoSFImage\fP instances can be exported and imported as any other field class in Coin\&.
.PP
The components of an \fBSoSFImage\fP is: its image dimensions (width and height), the number of bytes used for describing each pixel (number of components) and an associated pixel buffer\&. The size of the pixel buffer will be width*height*components\&.
.PP
For texture maps, the components / bytes-per-pixel setting translates as follows: use 1 for a grayscale imagemap, 2 for grayscale + opacity (i\&.e\&. alpha value), 3 for RGB (1 byte each for red, green and blue) and 4 components means 3 bytes for RGB + 1 byte opacity value (aka RGBA)\&.
.PP
This field is serializable into the Inventor / Coin file format in the following manner:
.PP
.PP
.nf
FIELDNAME X Y C 0xRRGGBBAA 0xRRGGBBAA \&.\&.\&.
.fi
.PP
.PP
'X' and 'Y' are the image dimensions along the given axes, 'C' is the number of components in the image\&. The number of 0xRRGGBBAA pixel color specifications needs to equal the exact number of pixels, which of course is given by X*Y\&. Each part of the pixel color value is in the range 0x00 to 0xff (hexadecimal, 0 to 255 decimal)\&.
.PP
For 3-component images, the pixel-format is 0xXXRRGGBB, where the byte in the pixel color value marked as 'XX' is ignored and can be left out\&.
.PP
For 2-component images, the pixel-format is 0xXXXXGGAA, where the bytes in the pixel color values marked as 'XX' are ignored and can be left out\&. 'GG' is the part which gives a grayscale value and 'AA' is for opacity\&.
.PP
For 1-component images, the pixel-format is 0xXXXXXXGG, where the bytes in the pixel color values marked as 'XX' are ignored and can be left out\&.
.PP
The pixels are read as being ordered in rows along X (width) and columns along Y (height, bottom to top)\&.
.PP
Here's a simple example of the file format serialization, for a 2x2 RGB-image inside an \fBSoTexture2\fP node, as mapped onto an \fBSoCube\fP:
.PP
.PP
.nf
Complexity { textureQuality 0\&.1 }   # set low to avoid smoothing

Texture2 {
   image 2 2 4

   0xffffffff 0x00ff0088   # white   semi\-transparent green
   0xff0000ff 0xffff00ff   #  red    yellow
}

Cube { }
.fi
.PP
.PP
The mini-scene graph above results in the following mapping on the cube:
.br
.PP
  
.PP
The cube has only been \fIslightly\fP rotated, so as you can see from the snapshot, the Y-rows are mapped from bottom to top, while the X-column pixels are mapped onto the cube from left to right\&.
.PP
\fBSee also\fP
.RS 4
\fBSoTexture2\fP, \fBSoSFImage3\fP 
.RE
.PP

.SH "Member Function Documentation"
.PP 
.SS "\fBvoid\fP * SoSFImage::createInstance (\fBvoid\fP)\fC [static]\fP"
\fIThis API member is considered internal to the library, as it is not likely to be of interest to the application programmer\&.\fP
.br

.br
 Creates a new instance of the class type corresponding to the \fBSoType\fP object\&. 
.br
 
.SS "\fBSoType\fP SoSFImage::getClassTypeId (\fBvoid\fP)\fC [static]\fP"
This static method returns the \fBSoType\fP object associated with objects of this class\&. 
.br
 
.SS "\fBSoType\fP SoSFImage::getTypeId (\fBvoid\fP) const\fC [virtual]\fP"
Returns the type identification of an object derived from a class inheriting \fBSoField\fP\&. This is used for runtime type checking and 'downward' casting\&. 
.br
 
.PP
Implements \fBSoField\fP\&.
.SS "\fBvoid\fP SoSFImage::copyFrom (\fBconst\fP \fBSoField\fP & f)\fC [virtual]\fP"
Copy value(s) from \fIf\fP into this field\&. \fIf\fP must be of the same type as this field\&. 
.PP
Implements \fBSoField\fP\&.
.SS "SbBool SoSFImage::isSame (\fBconst\fP \fBSoField\fP & f) const\fC [virtual]\fP"
Check for equal type and value(s)\&. 
.PP
Implements \fBSoField\fP\&.
.SS "\fBvoid\fP SoSFImage::initClass (\fBvoid\fP)\fC [static]\fP"
Internal method called upon initialization of the library (from \fBSoDB::init()\fP) to set up the type system\&.   
.SS "\fBconst\fP \fBunsigned\fP char * SoSFImage::getValue (\fBSbVec2s\fP & size, int & nc) const"
Return pixel buffer, set \fIsize\fP to contain the image dimensions and \fInc\fP to the number of components in the image\&. 
.SS "\fBconst\fP \fBSbImage\fP & SoSFImage::getValue () const"

.PP
\fBReturn values\fP
.RS 4
\fI\fBSbImage\fP\fP contained by this \fBSoSFImage\fP 
.RE
.PP

.SS "\fBvoid\fP SoSFImage::setValue (\fBconst\fP \fBSbVec2s\fP & size, \fBconst\fP int nc, \fBconst\fP \fBunsigned\fP char * pixels, SoSFImage::CopyPolicy copypolicy = \fCCOPY\fP)"
Initialize this field to \fIsize\fP and \fInc\fP\&.
.PP
If \fIpixels\fP is not \fCNULL\fP, the image data is copied from \fIpixels\fP into this field\&. If \fIpixels\fP is \fCNULL\fP, the image data is cleared by setting all bytes to 0 (note that the behavior on passing a \fCNULL\fP pointer is specific for Coin, Open Inventor will crash if you try it)\&.
.PP
The image dimensions is given by the \fIsize\fP argument, and the \fInc\fP argument specifies the number of bytes-pr-pixel\&. A 24-bit RGB image would for instance have an \fInc\fP equal to 3\&.
.PP
The \fIcopypolicy\fP argument makes it possible to share image data with \fBSoSFImage\fP without the data being copied (thereby using less memory resources)\&. The default is to copy image data from the \fIpixels\fP source into an internal copy\&.
.PP
\fIImportant\fP \fInote:\fP if you call this with \fIcopypolicy\fP as either \fCNO_COPY_AND_DELETE\fP or \fCNO_COPY_AND_FREE\fP, and your application is running on Microsoft Windows, be aware that you will get mysterious crashes if your application is not using the same C library runtime as the Coin library\&.
.PP
The cause of this is that a memory block would then be allocated by the application on the memory heap of one C library runtime (say, for instance \fC\fBMSVCRT\&.LIB\fP\fP), but attempted deallocated in the memory heap of another C library runtime (e\&.g\&. \fC\fBMSVCRTD\&.LIB\fP\fP), which typically leads to hard-to-debug crashes\&.
.PP
\fBSince\fP
.RS 4
The CopyPolicy argument was added in Coin \fB2\&.0\fP\&. 
.PP
CopyPolicy was added to TGS Inventor \fB3\&.0\fP\&. 
.RE
.PP

.SS "int SoSFImage::operator== (\fBconst\fP \fBSoSFImage\fP & field) const"
Compare image of \fIfield\fP with the image in this field and return \fCTRUE\fP if they are equal\&. 
.SS "int SoSFImage::operator!= (\fBconst\fP \fBSoSFImage\fP & field) const\fC [inline]\fP"
Compare image of \fIfield\fP with the image in this field and return \fCFALSE\fP if they are equal\&. 
.SS "\fBunsigned\fP char * SoSFImage::startEditing (\fBSbVec2s\fP & size, int & nc)"
Return pixel buffer\&. Return the image size and components in \fIsize\fP and \fInc\fP\&.
.PP
You cannot use this method to set a new image size\&. Use \fBsetValue()\fP to change the size of the image buffer\&.
.PP
The field's container will not be notified about the changes until you call \fBfinishEditing()\fP\&. 
.SS "\fBvoid\fP SoSFImage::finishEditing (\fBvoid\fP)"
Notify the field's auditors that the image data have been modified\&. 
.SS "\fBvoid\fP SoSFImage::setSubValue (\fBconst\fP \fBSbVec2s\fP & dims, \fBconst\fP \fBSbVec2s\fP & offset, \fBunsigned\fP char * pixels)"
Not yet implemented for Coin\&. Get in touch if you need this method\&.
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor \fB3\&.0\fP 
.RE
.PP

.SS "\fBvoid\fP SoSFImage::setSubValues (\fBconst\fP \fBSbVec2s\fP * dims, \fBconst\fP \fBSbVec2s\fP * offsets, int num, \fBunsigned\fP char ** pixelblocks)"
Not yet implemented for Coin\&. Get in touch if you need this method\&.
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor \fB3\&.0\fP 
.RE
.PP

.SS "\fBunsigned\fP char * SoSFImage::getSubTexture (int idx, \fBSbVec2s\fP & dims, \fBSbVec2s\fP & offset) const"
Not yet implemented for Coin\&. Get in touch if you need this method\&.
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor \fB3\&.0\fP 
.RE
.PP

.SS "SbBool SoSFImage::hasSubTextures (int & numsubtextures)"
Returns whether or not sub textures was set up for this field\&.
.PP
If \fCTRUE\fP is returned, the \fInumsubtextures\fP argument will be set to the number of sub textures in this image\&. This number can be used for iterating over all textures with the SoSFImage::getSubTextures() method\&.
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor \fB3\&.0\fP 
.RE
.PP

.SS "\fBvoid\fP SoSFImage::setNeverWrite (SbBool flag)"
Set this flag to true to avoid writing out the texture to file\&. This can save a lot on file size\&.
.PP
Default value is \fCFALSE\fP (i\&.e\&. write texture data to file\&.)
.PP
(Note: yet unimplemented for Coin\&.)
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor ?\&.? 
.RE
.PP

.SS "SbBool SoSFImage::isNeverWrite (\fBvoid\fP) const"
Returns value of 'never write texture data' flag\&.
.PP
\fBSee also\fP
.RS 4
\fBSoSFImage::setNeverWrite()\fP
.RE
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor ?\&.? 
.RE
.PP

.SS "SbBool SoSFImage::hasTransparency (\fBvoid\fP) const"
Returns \fCTRUE\fP if at least one pixel of the image in this field is not completely opaque, otherwise \fCFALSE\fP\&.
.PP
\fBSince\fP
.RS 4
Coin \fB2\&.0\fP 
.PP
TGS Inventor ?\&.? 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for Coin from the source code\&.